Collapsible core.



J. YEMIKER & P. S. STILES.

OOLLAPSIBLE GORE.

APPLICATION FILED MAY 6, I912.

Patented Jun 3,1913.

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lm/ meson "UNI ED STATES PATENT OFFICE.

JOHN YEMIKER vAND FREDERICK S. S TILES, 0F AKRON,'OHIOL' vA53SIGrllORS TO THE FAULTLESS MACHINE AND MANUFACTURING COMPANY, OF AKRON, OHIO, A COR- PORATION OF OHIO.

i ooLLAPsIBLn CORE.

1 ,oesaar.

Specification of Letters Patent. Application filed May a; 1912. Serial No. 695,554;

Patented June 3, 1913.

T0 (171 whom it may concern 2 Be it known that we, JOHN YEM'IKER and Fnnnnnicn 'S. S'rm'ris, citizens of the United States, residing at. Akron, in the county of Summit and State of Ohio, have invented certain new and useful Improvements in Collapsible (l'ores of which the following is a specification, reference beinghad to the accompanying drawings.

This invention comprehends certainnew anduseful improvements in collapsible cores or mandrels, the present invention relating particularly to a collapsible core. for use in molding rubber tires or'analogous articles and further relates "to improvements in the type or core disclosed in Letters Patent of the United StatespNo. 995,732; issued June 20. 1911. i i r The present invention likethe patented invention, has for its primary object a collapsiblc core of this character with improved means forniniting its members' or sections togetheriwithout the use of bolts and nuts i T A further object of'the invention is a simple, more durable, and eflicient fastening means for a collapsible core which will tend to effectively draw the core sections or members together and in which theparts are so constructed as to readily compensate for wear. 9 i I A still further object of the invention is the provision of simple and etlicient ineans, whereby the sections will be securely held firmly in place when being assembled and not permitted to accidentally break down. And the invention also aims to generally improve devices of this class and to render them more useful and" commercially desirable. i I

With these and other objects: in View, as will more fully appear as the description proceeds, the invention consists in certain constructions, arrangements and combinations of the parts that we shall hereinafter fully describe and claim. I

For a full understanding ofthe invention, reference is to be had to the following description and accompanying drawing, in which,f I j Figure 1 is aside. elevation, part-1y broken away, of ckillapsible tire'mold construct-- edinfaccordancd with my invention. Fig. 2 is an enlarged transverse sectlonal view, the

I section being taken approximately on the line 22, of Fig. 1, and, F p. 3 is a perspective view of a wrench which may be employed to draw together the clamping band which forms apart of the invention.

Corresponding and like parts are referred to in the following description and desig- 'nated in theaccompanying drawing by like reference characters The body of the core is composed-of a. plurality of separable sections which are segmental in form and tubular. In the present instance, there are four of these sections employed. designated 1; 9. 3 and 4, although it is to be understood that the invention is not limited in this regard. Any desired number of the sect-ions'of the core (the section 4 in the present instance,- has its ends disposed in plane's oblique to the radii of the annular body of the core. the inner portion of such section being of greater length than the outer or peripheral portion, whereby the-member 4 will serve in the na ture of a key and may be readilv moved inward'ont of engagement with the obliquely arranged ends of the adjacent members 1 and 3 when it is desired to collapse the core preparatory to removing it from the molded moved from the tire casing after the key member 4 has been removed.

4 Each of the sections which together form the body of the core. is formed on its inner side with a segmental flange, the ends of said flanges when the sections are assembled, abutting against each other to constitute an annular bead which is adapted to be engaged by the improved clamping means. This bead, designated 5. is formed on one side with outwardly and inwardly facing under cut annular shoulders designated 6 and 7, respectively. S designates an endless ringwhich is adapted to constitutea mandrel for the core. as best illustrated in Fig. 1. said ring having a plane outer face which abuts against the inner plane circular face of the head 5; the mandrel being formed at one side with. an under cuta split clamping ring 10' which is formed with a flat face abutting against the flat face of the bead and which extends inwardly over the flat adjoining side face of the mandrel 8, as best illustrated in Fig. 2. The clamping ring 10 is formed with an under cut flange 11 which engages with the under cut annular shoulder 6 of the bead. At its ends or split portion, the clamping ring 10 is formed with apertures 12 and 13 and also with apertures 14 and 15 which are designed to register with openings that are formed, in the present embodiment of the invention, in the bead of the section 2 of the core.

To clamp the parts together. we employ a wrench 16, said wrench including a spindle 17 which is journaled at one end in an opening 18 formed in a bar 19, said spindle being bead 5, and the clamping ring 10 is applied tightly in engagement.

to one side face of the bead 5, the flange 11 of said clamping ring being engaged with the under .cut annular shoulder 6 of the bead and the inner edge of the clamping ring'overlapping the flanged edge of the mandrel, whereby to prevent sidewise displacement of the parts. The studs 21 and 22 are then inserted in the apertures 12 and 13 and the handle 20 is grasped so as to turn the spindle 17 in a direction to draw the stud 21 toward the stud 22, thereby drawing the two ends of the clamping ring and consequently, the sections of the core firmly toward each other so as to hold the sections When this operation is completed, taper pins 23 or similar devices-are inserted into the apertures14. and 15 and registering openings in the head 5, thereby. holding the parts securely together. The wrench is then removed. Preferably, the aperture in the head 5 which registers with the aperture 15 in the ring 10 is defined by a pgefm'ablv hardened steel bushing 24 whichis screwed into place in the bead so that it can be removed md replaced in case of wear. Fig. 2.

While the accompanying drawing illustrates what we believe to be the preferred embodiment of our invention. it is to be understood that the invention is not limited thereto, but that various changes may be This is shown in ade in the construction, arrangement and proportions of the parts without departing fro n the scope of the invention, as defined li itt e appended claims.

' hat we claim is:

1. A collapsible core, including a plurality of separable segmental sect ions adapt- \ed to abut against each other to produce a circular body and provided at their inner edges with flanges forming an annular head, said head being provided on one side with an annular shoulder, a mandrel mounted within the circle of said lJTflfl and ngaging the latter, a clamping ring engaging the shouldered side of said head and formed with a flange engaging said shoulder, said ring being adapted to be contiau ted around said shoulder, and fastening devices for securing the clamping ring to the head.

2. A collapsible core for the purpose specified, including a plurality of separable segmental sections adapted to abut at their ends to prcuuce a circular body, said sections being formed at their inner edges with segmental flanges designed to form an annular bead, a mandrel fitting within the circle of said bead and engaging the latter, the bead being formed on one side with an annular under cut shoulder, a split clamping ring engaging the shouldered side of said head and formed with an under cut flange engaging with the under cut shoulder of the head, the clamping ring being adapted to be contracted around the shoulder, and fastening devices for securing the ends of the clamping ring to the head.

3. A collapsible mold, for the purpose specified, including a plurality of separable segmental sections adapted to abut; at their ends to form a. circular body, said scctions being formed at their inner edges with segmental flanges designed to produce an aunular bead, the bead being formed on one side with an ,inwardly facing annular shoulder, a mandrel fitting within the circle of the bead and engaging the latter and formed on one side with a flange engaging said shoulder, a clamping ring engaging one side of said head and adapted to draw the sections together, and means for connecting the clamping ring to the head.

4-. A collapsible core, for the purpose specified, including a plurality of separable segmental sections designed to abut at their ends to produce a circular body, said sec tions being formed at their inner edges with segmental flanges designed to produce an annular head, the bead being formed on one side with an inwardly facing annular shoulder and with an outwardly facing annular shoulder, a mandrel fitting within the circle of the bead andengaging the latter and formed at one side with a flange engaging the inwardly facing annular shoulder, a clamping ring engaging one side of the bead and formed with aflange engaging the outwardly facing annular shoulder and adapted to be contracted thereon, and means for fastening the clamping ring to the head.

5. A collapsible core for the purpose specifled, including a plurality of separable segmental sections adapted to abut at their ends to produce a circular body, the see-. tions being formed at their inner edges with segmental flanges designed to prgduce an annular head, the bead being formed with an inwardly facing annular shoulder and with an outwardly facing annular shoulder, a mandrel fitting within the circle of the bead and engaging the latter and formed with a flange engaging the inwardly facing shoulder, a clamping ring engaging one side of said bead and formed with a flange engaging the outwardly facing shoulder and' adapted to be contracted thereon, and fastening devices for securing the clamping ring to the head.

6. A collapsible core, for the purpose specified including a plurality of separable segmental sect-ions adapted to abut at their ends to produce a circular body, the sections being formed at their inner edges with segmental flanges desi ed to produce an annular bead, the'bead eing formed at one side with an outwardly facing annular shoulder and with an inwardly facing annular shoulder, a mandrel fitted within the circle of said bead and engaging the latter and formed with a flange engaging the inwardly facing shoulder, a clamping ring engaging one side of said head and overlapping the side of the mandrel, the ring being formed with a flange engaging the outwardly facing shoulder and adapted to be contracted thereon, and means for connecting the clamping ring to the bead.

In testimony whereof we hereunto aflix our signatures in the presence of two wit nesses. v

JOHN YEMIKER; FRED. S. STILES.

Witnesses:

J. H. Ann, C. L. DINSMORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ratentl.

Washington, D. G. 

